Keywords:
Education and training, Dosimetric comparison, Radiation safety, Physics, Dosimetry, Percutaneous, Catheter arteriography, Radioprotection / Radiation dose, Radiation physics, Cardiac
Authors:
M. Kato1, K. Chida2, T. Moritake3, Y. Koguchi4, T. Sato1, H. Oosaka1, T. Tosa1, K. Kadowaki1; 1Akita/JP, 2Sendai/JP, 3Tsukuba/JP, 4Higashiibarakigun Oaraimachi/JP
DOI:
10.1594/ecr2013/C-0687
Results
The relationship between effective energy (keV) obtained HVL and tube voltage of 70 to 120 kVp is shown in Figure 4.
The effective energies at 70,
80,
90,
100,
110,
and 120 kVp were 40.8,
42.2,
44.7,
46.9,
48.1,
and 50.5 keV,
respectively.
The energy dependence (keV) is shown in Figure 5.
The GD-302M showed high sensitivity,
and the sensitivity tended to decrease a little as effective energy increased.
The calibration factor of the GD-302M is shown in Figure 6.
The dose dependence of the GD-302M is shown in Figure 7.
The GD-302M showed excellent linearity,
with R2 > 0.99.
The dose rate dependence is shown in Figure 8.
The GD-302M showed excellent linearity,
with R2 > 0.99 over a range of 104-fold (100–103).
The angular dependence in the short annd long axes is shown in Figure 9.
GD-302M showed no angular dependence in the short axis.
GD-302M showed reliable dose response at angles between 0 and ± 60° in the long axis.
At angles of 90°,
the dose response varied widely.
- direct dose measurement method
The irradiation fields were confirmed by using the radiochromic dosimetry films in cardiac interventional phantom experiment,
and placement of RPLDs was optimized (Figure 10-11).
We made a dosimetry gown,
which has small pockets to insert the RPLD chips,
to measure the accurate ESD and its mapping.